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12 Questions

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What is a Star?

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Questions and Answers

What is the source of energy for stars like our Sun?

Combustion of hydrogen

Nuclear fission reactions

Conversion of mass into energy

Nuclear fusion reactions involving hydrogen (correct)

What is the primary force that holds a star together?

Nuclear fusion

Electromagnetic force

Gravitational force (correct)

Strong nuclear force

What is the interstellar medium (ISM)?

The region where stars are born

Thinly spread gas and dust in outer space (correct)

The area surrounding a black hole

The vacuum between stars

What is the name given to the dense clouds of gas and dust where stars are formed?

Nebula Signup and view all the answers

How old is our Sun?

4.5 billion years Signup and view all the answers

What is the initial process that leads to the formation of stars?

Gravitational collapse of molecular clouds Signup and view all the answers

Which of the following is a key factor in the formation and development of stars?

Gravitational attraction Signup and view all the answers

What is the primary process that drives the energy production of stars like our Sun?

Thermonuclear fusion Signup and view all the answers

How do the masses of stars influence their life cycle and evolution?

Stars with higher masses evolve more rapidly than stars with lower masses. Signup and view all the answers

What is the primary source of the interstellar medium (ISM) that eventually leads to the formation of stars?

Expelled matter from supernova explosions Signup and view all the answers

Which of the following best describes the initial stage of star formation from the interstellar medium?

The clouds of gas and dust accumulate and increase in density due to gravity. Signup and view all the answers

How old is our Sun, according to the information provided in the text?

Approximately 4.5 billion years old Signup and view all the answers